It is possible to calculate the c-index for time dependent outcomes (such as disease) using the survivalROC package in R. My question is : is it possible to produce a p-value for the c-index that is calculated (at a specific point in time)?
If I were to use a standard ROC I understand that I can use Wilcoxon test to calculate the p-value of the AUC (here's a simple example). However, because this is survival data I don't think I can use quite the same approach. I have thought of just calculating the concordance index using the survcomp package and getting the p-value from that, however
survivalROC predicts the c-index at a specific time, whereas the concordance index doesn't seem to.